CN115465825A - Elevating work platform - Google Patents

Abstract

The invention discloses a lifting working platform, and relates to the field of engineering machinery. The lifting working platform comprises a lower vehicle mechanism, a luffing mechanism, a first counterweight, a second counterweight, an arm support and a platform. The get-off mechanism is configured to provide support; the amplitude variation mechanism is arranged on the rotary table; the first counterweight is fixed on the lower vehicle mechanism; the second counterweight is arranged on the luffing mechanism in a sliding way; one end of the arm support is arranged on the amplitude variation mechanism and is constructed to change amplitude along with the amplitude variation of the amplitude variation mechanism; the platform is arranged at the other end of the arm support. According to the lifting working platform provided by the technical scheme, the forward tilting stability and the backward tilting stability of the whole vehicle under different working conditions are improved to a great extent, and the safety of the movable lifting working platform is improved.

Description

Elevating work platform

technical field

The invention relates to the field of engineering machinery, in particular to an elevating work platform.

Background technique

The mobile elevating work platform is mainly used in construction, steel structure, venues and leasing industries. As a kind of engineering equipment for manned operations, its safety is extremely important, and the stability of the vehicle is adjusted by the counterweight. it goes without saying.

In the related art, the mobile elevating work platform includes a fixed counterweight. After the fixed counterweight is installed and put in place, the position of the fixed counterweight relative to the turntable remains unchanged.

The inventors found that there are at least the following problems in the related art: the related art adopts a fixed counterweight, and the fixed counterweight is installed on the turntable, and the weight and size of the fixed counterweight are very large, which leads to a relatively heavy vehicle weight. Large or relatively large size of the whole vehicle will increase the cost of the whole machine, increase energy consumption, or reduce the flexibility of the whole vehicle.

Contents of the invention

An embodiment of the present invention provides a lifting work platform, including:

an alighting mechanism configured to provide support;

The luffing mechanism is installed on the alighting mechanism;

a first counterweight arranged on the alighting mechanism;

the second counterweight is slidably installed on the luffing mechanism;

a jib, one end of which is mounted on the luffing mechanism; and

The platform is installed on the other end of the boom.

In some embodiments, the getting off mechanism includes:

a frame, configured to provide support; and

A turntable is installed on the vehicle frame, the luffing mechanism is installed on the turntable, and the first counterweight is arranged on the turntable.

In some embodiments, the elevating work platform further includes:

The first driving mechanism, one end is drivingly connected with the boom, and the other end is installed on the alighting mechanism; the first driving mechanism is configured to drive the boom to change amplitude; the boom drives the swing Institutional co-variation.

In some embodiments, the elevating work platform further includes:

The second driving mechanism is drivingly connected with the second counterweight, so that the second counterweight slides along the luffing mechanism to adjust the center of gravity of the elevating work platform.

In some embodiments, the first drive mechanism includes:

A pull rod is located between the alighting mechanism and the second counterweight, one end of the pull rod is rotatably connected to the alighting mechanism, and the other end of the pull rod is rotatably connected to the second counterweight.

In some embodiments, the luffing mechanism includes:

One end of the parallelogram mechanism is rotatably connected to the alighting mechanism, and the other end is rotatably connected to the boom.

In some embodiments, the parallelogram mechanism includes:

a first link assembly, one end of which is rotatably connected to the alighting mechanism; the second slider is slidably mounted on the first link assembly;

A second link assembly, one end of which is rotatably connected to the alighting mechanism;

a first lattice arm, one end of which is rotatably connected to the other end of the first link assembly, and the other end is rotatably connected to the other end of the second link assembly;

a second lattice arm, one end of which is rotatably connected to the other end of the first link assembly and one end of the first lattice arm, and the other end is rotatably connected to the boom; and

The third truss arm forms a triangle together with the first truss arm and the second truss arm; one end of the third truss arm is rotatably connected to the second link assembly and the second link assembly, The other end of the third lattice arm is rotatably connected to the second lattice arm and the boom;

Wherein, the first link assembly, the second link assembly, the first truss arm and the alighting mechanism jointly form the parallelogram mechanism.

In some embodiments, one of the second counterweight and the first link assembly is provided with a guide rail, and the other is provided with a slider; the slider cooperates with the guide rail; the length of the guide rail The direction is along the length direction of the first link assembly.

In some embodiments, when the luffing mechanism is in the initial position, the installation position of the second sliding block is lower than the second connecting rod assembly.

In some embodiments, a first mounting frame is installed on the top of the getting off mechanism, and the first mounting frame protrudes from the top surface of the turntable; one end of the first link assembly is mounted on the first mounting frame shelf.

In some embodiments, a second mounting bracket is installed on the top of the getting off mechanism, and the second mounting bracket protrudes from the top surface of the getting off mechanism; one end of the second link assembly is installed on the first Two mounting brackets.

In some embodiments, the position of the rotational connection between the first link assembly and the first mounting frame is lower than the position of the rotational connection of the second link assembly and the second mounting frame.

In some embodiments, when the luffing mechanism is at the initial position, the second slider is located above the first slider and is located at the other end of the first link assembly.

In some embodiments, when the luffing mechanism is in the final position, the second sliding block and the first sliding block are respectively located on both sides of the turning center of the getting off mechanism, and the second sliding block Located at one end of the first link assembly.

In some embodiments, the platform is rotatably connected to the jib, so that during the luffing process of the jib, the platform always maintains an upright state under its own gravity.

The elevating work platform provided by the above technical solution includes a first counterweight and a second counterweight, wherein the first counterweight is fixed; the second counterweight automatically and dynamically adjusts the lifting height with the amplitude of the luffing mechanism of the elevating work platform. The position of the center of gravity of the working platform reduces the magnitude of the change of the center of gravity of the vehicle to the first counterweight direction when the boom is luffing upward, and reduces the variation of the vehicle's center of gravity away from the first counterweight direction when the boom is luffing downward. Without increasing the weight and size of the vehicle, the real-time change of the second counterweight position greatly improves the forward and backward stability of the vehicle under different working conditions, and improves the mobility of the mobile lift. Work platform safety. Moreover, the size and weight of the first counterweight required by the technical solution are small, and the occupied space is small, and the operation performance, operation safety, economy, flexibility and energy saving of the elevating work platform are all improved.

Description of drawings

The accompanying drawings described here are used to provide a further understanding of the present invention and constitute a part of the application. The schematic embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute improper limitations to the present invention. In the attached picture:

Fig. 1 is a schematic diagram of the initial position of the elevating work platform provided by the embodiment of the present invention.

Fig. 2 is a schematic diagram of the elevating work platform provided by the embodiment of the present invention in the middle position of luffing.

Fig. 3 is a schematic diagram of the final position of the elevating work platform luffing provided by the embodiment of the present invention.

Fig. 4 is a schematic diagram of the installation of the second counterweight of the elevating work platform provided by the embodiment of the present invention.

Reference signs: 1, alighting mechanism; 2, luffing mechanism; 3, first counterweight; 4, second counterweight; 5, jib; 6, platform; 7, pull rod; 8, slide block; 11, Frame; 12, turntable; 13, first mounting frame; 14, second mounting frame; 15, shaft; 21, first connecting rod assembly; 22, second connecting rod assembly; 23, first truss arm; 24, The second lattice arm; 25, the third lattice arm.

detailed description

The technical solution provided by the present invention will be described in more detail below with reference to FIGS. 1 to 4 .

Referring to Fig. 1 , an embodiment of the present invention provides an elevating work platform, which is used to transport people and objects from one height to another, so as to meet the requirements of high-altitude operations and high-altitude material transportation. The weight of the manned and loaded objects on the elevating work platform is related to the structural size of the platform 6, and generally can realize the lifting requirements of a single person or multiple people. The maximum operating height of the lifting work platform is generally 40 meters to 70 meters.

The elevating work platform includes a dismounting mechanism 1 , a luffing mechanism 2 , a first counterweight 3 , a second counterweight 4 , a jib 5 and a platform 6 .

The alighting mechanism 1 is configured to provide support. The structural dimension of getting off mechanism 1 is relevant with concrete vehicle type. The getting off mechanism 1 includes a vehicle frame 11 and a turntable 12 . The bottom of the vehicle frame 11 can be equipped with a running gear, and the running gear is located on the ground P. There are many types of walking mechanism: crawler walking mechanism, wheel walking mechanism, ring rail walking mechanism and so on. In some embodiments, in order to achieve the purpose of facilitating special transportation, the running mechanism adopts wheeled running mechanism, that is, tires. The tires have good maneuverability on hard ground, and the transfer speed is fast and efficient, which can meet emergency needs such as high-altitude fire rescue.

Referring to FIG. 1 , the turntable 12 is installed on the vehicle frame 11 . Specifically, the turntable 12 is rotatably mounted on the vehicle frame 11 , and the turntable 12 can rotate along its own circumferential direction to change the position and direction of the boom 5 , thereby enabling the boom 5 to work in different directions. The structural size of the turntable 6 is not limited. Generally speaking, the turntable 6 can realize a 360° rotation along its own circumferential direction. This structure makes it possible to rotate the turntable 6 regardless of the position where the elevating work platform stops. The position of the boom 5 and the platform 6 connected to the boom 5 can meet the requirements of work and rescue.

The luffing mechanism 2 is installed on the alighting mechanism 1 , specifically on the turntable 12 . The luffing mechanism 2 is a mechanism capable of changing an inclination angle with respect to the ground. The luffing mechanism 2 has many realization forms. In some embodiments, the luffing mechanism 2 includes a parallelogram mechanism, and the parallelogram mechanism may be composed of a plurality of truss arms, and the arrangement of these truss arms is determined according to parameters such as the weight of the hoisted boom 5 . The action of the luffing mechanism 2 is divided into two: one of them is called the first luffing, and the other is called the second luffing. In the process change from FIG. 1 to FIG. 3 , the jib 5 is raised slowly, and this process is called the first luffing, or the upper luffing. The upward luffing makes the height of people and objects carried by the platform 6 gradually increase, so as to meet the needs of high-altitude operations and high-altitude rescue. In the process change from FIG. 3 to FIG. 1 , the jib 5 is lowered slowly, and this process is called the second amplitude change, or called the lower amplitude change. The lower amplitude makes the height of people and objects carried by the platform 6 gradually decrease, so as to meet the needs of returning to the ground, low-altitude operation, and low-altitude rescue.

The structural size and arrangement of the luffing mechanism 2 are related to the length, structure and weight of the jib 5 . The amplitude change of the amplitude change mechanism 2 is realized along with the amplitude change of the boom 5 . Referring to FIG. 1 to FIG. 3 , one end of the jib 5 is installed on the luffing mechanism 2 , and the jib 5 is configured to carry the luffing mechanism 2 to wriggle. The jib 5 can rotate relative to the ground to complete luffing operations. Specifically, the elevating work platform also includes a first driving mechanism (not shown in the figure), one end of the first driving mechanism is drivingly connected with the boom 5, and the other end of the first driving mechanism is installed on the dismounting mechanism 1, specifically installed on Turntable 12. The first driving mechanism is configured to drive the jib 5 to change amplitude. During the luffing process of the jib 5 , since the jib 5 is connected with the luffing mechanism 2 , the jib 5 will drive the luffing mechanism 2 to luff together. As the jib 5 swings, the jib 5 rotates relative to the ground P, so that the platform 6 located at the other end of the jib 5 is lifted along with the other end of the jib 5 .

The luffing mechanism 2 is set so that the jib 5 is not directly installed on the turntable 12, but has a certain distance from the turntable 12, and during the luffing process of the jib 5, the luffing mechanism 2 is also luffing, which makes the jib 5 Driven by the first driving mechanism, it has a greater lifting height.

Referring to FIGS. 1 to 3 , in some embodiments, the luffing mechanism 2 includes a first link assembly 21 , a second link assembly 22 , a first lattice arm 23 , a second lattice arm 24 and a third lattice arm 25 .

One end of the first link assembly 21 is rotatably connected to the turntable 12 . The first link assembly 21 can be formed by one rod, or a plurality of rods. 1 to 3, the top of the turntable 12 is equipped with a first mounting frame 13, one end of the first mounting frame 13 is installed on the top surface of the turntable 12, and the other end of the first mounting frame 13 is higher than the top of the turntable 12 noodle. One end of the first link assembly 21 is connected to the other end of the first mounting frame 13 . One end of the first link assembly 21 is directly mounted on the first installation frame 13 . The first mounting bracket 13 lifts one end of the first link assembly 21 away from the turntable 12 , which can prevent the first link assembly 21 from interfering with the turntable 12 and the second link assembly 22 during the luffing process. The first installation frame 13 can adopt various implementation forms such as steel structure and truss structure.

The second sliding block 9 is slidably mounted on the first link assembly 21 . The second slider 9 is slidingly fitted with the first connecting rod assembly 21, and the second slider 9 moves along the length direction of the first connecting rod 31. Refer to Fig. 1 to Fig. 3 during the change process, the position of the second slider 9 moves direction.

In order to enable the second slider 9 not only to move from one end of the first link assembly 21 to the other end under its own weight, but also to return from the other end to one end, in some embodiments, the elevating work platform further includes a second Two driving mechanisms, the second driving mechanism is drivingly connected with the second counterweight 4 so that the second counterweight 4 slides along the luffing mechanism 2 to adjust the center of gravity of the elevating work platform.

In some embodiments, the second driving mechanism further includes a pull rod 8, the pull rod 8 is located between the turntable 12 and the second counterweight 4, one end of the pull rod 8 is rotatably connected to the turntable 12, and the other end of the pull rod 8 is connected to the second counterweight. 4 rotatable connections. The turntable 12 is equipped with an installation ear plate, and one end of the pull rod 8 is installed on the installation ear plate, and the pull rod 8 can rotate freely relative to the turntable 12 with pin shafts, bearings and other modes. The other end of the pull rod 8 is installed on the second counterweight 4, and can also be connected by installing lug plates, bearings and other components to ensure that the pull rod 8 can rotate freely around the shaft 15 relative to the second counterweight 4. The length of the pull rod 8 is constant, and the pull rod 8 is a rigid rod. During the luffing process, the second counterweight 4 slides under the action of its own weight during the luffing process and the upward luffing process; The turntable 12 is rotating, and during the rotation of the tie rod 8 , under the push of the tie rod 8 , the second counterweight 4 moves toward the side where the first lattice arm 23 is located. On the other hand, the tie rod 8 has a certain supporting effect on the second counterweight 4 and also has a certain supporting effect on the first link assembly 21, so that the first link assembly 21 will not be bent and deformed by the second counterweight 4 , so that the amplitude-changing mechanism 2 can be stably maintained in the state where the amplitude-changing is completed, that is, the state shown in FIG. 3 .

In some embodiments, one of the second counterweight 4 and the first link assembly 21 is provided with a guide rail (not shown), and the other is provided with a slider 9 . The slide block 9 cooperates with the guide rail; the length direction of the guide rail is along the length direction of the first link assembly 21 . Referring to FIG. 4 , specifically, the second counterweight 4 is provided with a slider 9 , and the first link assembly 21 is provided with a guide rail. The second counterweight 4 is installed in the guide rail of the luffing mechanism 2 through the slider 9 , cooperates with the luffing mechanism 2 through the slider 9 , and can slide along the length direction of the first link assembly 21 of the luffing mechanism 2 . The weight, sliding stroke, and fixed positions of both ends of the second counterweight 4 are determined according to calculations to ensure that the sliding process is smooth and free from problems such as dead spots, abnormal noises, and jitters.

One end of the second link assembly 22 is rotatably connected to the turntable 12 . In some embodiments, a second mounting frame 14 is installed on the top of the turntable 12 , one end of the second mounting frame 14 is fixed on the top surface of the turntable 12 , and the other end of the second mounting frame 14 is higher than the top surface of the turntable 12 . One end of the second link assembly 22 is connected to the other end of the second mounting frame 14 . One end of the second link assembly 22 is mounted on the first mounting frame 14 . The second mounting frame 14 adopts various realization forms such as steel structure and truss structure.

The height of the second mounting frame 14 is greater than that of the first mounting frame 14 . The position of the rotational connection between the first link assembly 21 and the first installation frame 13 is lower than the position of the rotational connection between the second link assembly 22 and the second installation frame 14 . This arrangement makes the first link assembly 21 and the second link assembly 22 in the initial position (the state shown in FIG. 1 ), the intermediate position (the state shown in FIG. 2 ), and the final position (the state shown in FIG. 3 ), There is a certain distance from each other, and the first link assembly 21 and the second link assembly 22 do not interfere with each other in any state. Moreover, at the initial position, the middle position and the final position, the length directions of the first link assembly 21 and the second link assembly 22 are all parallel to each other. This structure makes the first link assembly 21, the second link assembly 22 cooperate with the triangular structure formed by the first lattice arm 23, the second lattice arm 24 and the third lattice arm 25 described later, so that the The luffing operation of the amplitude mechanism 2 is very stable, which also makes the luffing operation of the boom 5 very stable. The initial position refers to the position where the luffing mechanism 2 is not luffing. In this state, the elevating work platform can be transported in transition, and the jib 5 is not working at this time.

One end of the first lattice arm 23 is rotatably connected to the other end of the first link assembly 21 , and the other end of the first lattice arm 23 is rotatably connected to the other end of the second link assembly 22 . One end of the second lattice arm 24 is rotatably connected to the other end of the first link assembly 21 and one end of the first lattice arm 23 , and the other end of the second lattice arm 24 is rotatably connected to the boom 5 . The third truss arm 25 forms a triangle with the first truss arm 23 and the second truss arm 24; one end of the third truss arm 25 is rotatably connected to the second link assembly 22 and the second link assembly 22, and the third truss The other end of the arm 25 is rotatably connected to the second lattice arm 24 and the boom 5 .

The above technical solution, the first link assembly 21, the second link assembly 22, the first truss arm 23, the turntable 12 (specifically refers to the first link assembly 21 and the first mounting frame 13, the second link assembly 22 and the The connection position of the second mounting bracket 14) roughly forms a parallelogram linkage mechanism, so no matter how the amplitude is changed, the first linkage assembly 21 and the second linkage assembly 22 are all parallel to each other. Referring to Fig. 2, the connection position M1 between the first link assembly 21 and the first mounting frame 13, the connection position M2 between the second link assembly 22 and the second mounting frame 14, the connection line between M1 and M2 is also connected to the first truss The lengths of the arms 23 correspond, and the length of the line segment M1M2 is substantially equal to the length of the first lattice arm 23 .

The first counterweight 3 is fixed on the turntable 12 . The first counterweight 3 is also called a fixed counterweight. After the first counterweight 3 is installed in place, its weight and position are all fixed. The first counterweight 3 is located on the edge of the turntable 12 . After the first counterweight 3 is installed on the turntable 12, its position and weight will not change. The first counterweight 3 is used to adjust the position of the center of gravity of the vehicle to ensure the stability of the vehicle. It should be noted that the first counterweight 3 plays a limited role in adjusting the stability of the whole vehicle. It does not realize the adjustment of the center of gravity of the whole vehicle alone, but works together with the second counterweight 4 introduced later to adjust the center of gravity. role.

The second counterweight 4 is slidably installed on the luffing mechanism 2 . The second counterweight 4 is also called active counterweight. The second counterweight 4 is configured to automatically change its position relative to the turntable 12 when the luffing mechanism 2 is luffing. During the process of the luffing mechanism 2 from the initial position to the final position, the second counterweight 4 is getting farther and farther away from the first counterweight 3 .

Referring to FIG. 1 , specifically, when the luffing mechanism 2 is in the initial position, the installation position of the second slider 9 is lower than the second link assembly 22 . When the luffing mechanism 2 is at the final position, the second slider 9 is located above the first slider 9 and at the other end of the first link assembly 21 .

2 and 3, when the luffing mechanism 2 is in the final position, the second slider 9 and the first slider 9 are respectively located on both sides of the center of rotation of the turntable 12, and the second slider 9 is located on the first link assembly 21 at one end.

In some embodiments, the weight of the first counterweight 3 is less than the weight of the second counterweight 4 . After the second counterweight 4 is provided, the weight of the first counterweight 3 can be greatly reduced, which can reduce the size of the vehicle occupied by the first counterweight 3 .

Working process: When working, the whole vehicle changes from the state shown in Figure 1 to the state shown in Figure 2, and then to the state shown in Figure 3, the angle α between the boom 5 and the ground gradually increases. During this process, the position of the first counterweight 3 remains unchanged. If there is no second counterweight 4, the position of the center of gravity of the vehicle changes to the direction of S1, and the caster stability becomes poor. After the second counterweight 4 is set, the second counterweight 4 moves along the direction of S2, then the center of gravity of the whole vehicle will also move towards the direction of S2, and the backward tilting stability becomes better. Finally, through the dynamics of the second counterweight 4 Adjustment, the vehicle's rear tilt stability remains basically unchanged. Looking at the luffing mechanism 2 and the jib 5 as a whole, the luffing of both is driven by the first driving mechanism. During the upward luffing process of the two, the second counterweight 4 can adjust the overall center of gravity formed by the entire luffing mechanism 2 and the boom 5, so that the overall center of gravity of the luffing mechanism 2 and the jib 5 is closer to the turntable 12 The end away from the first counterweight 3 reduces the risk of the elevating work platform toppling over, making the elevating work platform more stable.

The whole vehicle is from the state shown in Figure 3 to the state shown in Figure 2, and then to the state shown in Figure 1. The angle α between the boom 5 and the ground decreases gradually. If the second counterweight 4 is not provided, since the position of the first counterweight 3 remains unchanged, the position of the center of gravity of the vehicle changes in the direction of S2, and the forward tilting stability becomes poor. If the second counterweight 4 is provided, the second counterweight 4 slides along the luffing mechanism 2 in the direction of S1, the position of the center of gravity of the whole vehicle changes in the direction of S1, and the stability of the forward tilt becomes better. Finally, through the dynamic adjustment of the second counterweight 4, the forward tilt stability of the whole vehicle remains basically unchanged. Looking at the luffing mechanism 2 and the jib 5 as a whole, the luffing of both is driven by the first driving mechanism. During the downward luffing process of the two, the second counterweight 4 can adjust the overall center of gravity formed by the entire luffing mechanism 2 and the boom 5, so that the overall center of gravity formed by the entire luffing mechanism 2 and the jib 5 is closer to the first A counterweight 3, to reduce the risk of the lifting work platform toppling over, so that the stability of the lifting work platform is better.

It can be seen that in the above technical solution, by setting the second counterweight 4, the stability of the whole vehicle is basically unchanged during the amplitude change and reset process of the elevating work platform, which greatly increases the reliability of the whole vehicle. Compared with the related art, when the size of the whole vehicle remains unchanged, the technical solution of the present invention only needs a very small weight of the first counterweight 3 to achieve the same level as that achieved by the large-weight fixed counterweight in the related art. The same stability as the whole vehicle. When the weight of the first counterweight 3 is the same as that of the fixed counterweight in the related art, the stability of the whole vehicle achieved by the technical solution of the present invention is far higher than that of the related art.

Continuing to refer to FIG. 1 to FIG. 3 , the platform 6 is installed on the other end of the boom 5 . Platform 6 is used for carrying people and goods, so as to transport people and goods from one height (such as the bottom surface) to another height (such as high altitude), so as to realize projects such as air rescue and aerial work. In some embodiments, the platform 6 is rotatably connected to the jib 5 , so that the platform 6 always maintains an upright state under its own gravity during the luffing process of the jib 5 .

In describing the present invention, it is to be understood that the terms "central", "longitudinal", "transverse", "front", "rear", "left", "right", "vertical", "horizontal", The orientations or positional relationships indicated by "top", "bottom", "inner", "outer", etc. are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying It means that the device or element referred to must have a specific orientation, be constructed and operated for a specific orientation, and thus cannot be construed as limiting the protection content of the present invention.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: it can still be Modifications are made to the technical solutions described in the foregoing embodiments, or equivalent replacements are made to some of the technical features, but these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims (15)

1. An elevating work platform, characterized in that it comprises: an alighting mechanism (1) configured to provide support; luffing mechanism (2), installed on the alighting mechanism (1); a first counterweight (3), arranged on the alighting mechanism (1); The second counterweight (4) is slidably installed on the luffing mechanism (2); a boom (5), one end of which is installed on the luffing mechanism (2); and The platform (6) is installed on the other end of the boom (5). 2. The elevating work platform according to claim 1, characterized in that, the getting off mechanism (1) comprises: a frame (11) configured to provide support; and The turntable (12) is installed on the vehicle frame (11), the luffing mechanism (2) is installed on the turntable (12), and the first counterweight (3) is arranged on the turntable (12). 3. The elevating work platform according to claim 1, further comprising: The first driving mechanism, one end is drivingly connected to the boom (5), and the other end is installed on the alighting mechanism (1); the first driving mechanism is configured to drive the boom (5) to change amplitude, The jib (5) drives the luffing mechanism (2) to jointly vary the amplitude. 4. The elevating work platform according to claim 1, further comprising: The second driving mechanism is drivingly connected with the second counterweight (4), so that the second counterweight (4) slides along the luffing mechanism (2) to adjust the height of the elevating work platform center of gravity. 5. The elevating work platform according to claim 3, wherein the first driving mechanism comprises: A pull rod (7), located between the alighting mechanism (1) and the second counterweight (4), one end of the pull rod (7) is rotatably connected to the alighting mechanism (1), the The other end of the pull rod (7) is rotatably connected to the second counterweight (4). 6. The elevating work platform according to claim 1, characterized in that, the luffing mechanism (2) comprises: The parallelogram mechanism is rotatably connected to the getting off mechanism (1) at one end, and rotatably connected to the boom (5) at the other end. 7. The elevating work platform according to claim 6, wherein the parallelogram mechanism comprises: A first link assembly (21), one end of which is rotatably connected to the alighting mechanism (1); the second slider (9) is freely slidably mounted on the first link assembly (21); A second link assembly (22), one end of which is rotatably connected to the getting off mechanism (1); The first truss arm (23), one end is rotatably connected to the other end of the first link assembly (21), and the other end is rotatably connected to the other end of the second link assembly (22); The second truss arm (24), one end is rotatably connected to the other end of the first linkage assembly (21) and the first truss arm (23), and the other end is connected to the boom (5) rotatable connection; and The third lattice arm (25), forms a triangle together with the first lattice arm (23) and the second lattice arm (24); one end of the third lattice arm (25) is connected to the second linkage assembly ( 22), the second linkage assembly (22) can be rotatably connected, and the other end of the third lattice arm (25) can be connected with the second lattice arm (24) and the boom (5) rotary connection; Wherein, the first link assembly (21), the second link assembly (22), the first truss arm (23) and the alighting mechanism (1) jointly form the parallelogram mechanism. 8. The elevating work platform according to claim 7, characterized in that, one of the second counterweight (4) and the first link assembly (21) is provided with a guide rail, and the other is provided with a slide block (9); the slide block (9) cooperates with the guide rail; the length direction of the guide rail is along the length direction of the first link assembly (21). 9. The elevating work platform according to claim 7, characterized in that, when the luffing mechanism (2) is in the initial position, the installation position of the second slider (9) is lower than the second connecting rod Components (22). 10. The elevating work platform according to claim 1, characterized in that a first installation frame (13) is installed on the top of the getting off mechanism (1), and the first installation frame (13) protrudes from the turntable (12); one end of the first connecting rod assembly (21) is installed on the first installation frame (13). 11. The elevating working platform according to claim 10, characterized in that, a second mounting frame (14) is installed on the top of the getting off mechanism (1), and the second mounting frame (14) protrudes from the lower The top surface of the car mechanism (1); one end of the second link assembly (22) is installed on the second mounting bracket (14). 12. The elevating work platform according to claim 11, characterized in that, the position of the rotational connection between the first link assembly (21) and the first installation frame (13) is lower than that of the second link assembly. The location of the rotational connection between the rod assembly (22) and said second mounting bracket (14). 13. The elevating work platform according to claim 1, characterized in that, when the luffing mechanism (2) is in the initial position, the position of the second slider (9) is located at the position of the first slider (9) ), and located at the other end of the first linkage assembly (21). 14. The elevating working platform according to claim 1, characterized in that, when the luffing mechanism (2) is in the final position, the second slider (9) and the first slider (9) respectively It is located on both sides of the turning center of the getting off mechanism (1), and the second sliding block (9) is located at one end of the first link assembly (21). 15. The elevating work platform according to claim 1, characterized in that, the platform (6) is rotatably connected to the boom (5), so that during the luffing process of the boom (5), The platform (6) maintains an upright state under its own gravity.

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